Making the library compatible with CUDAdrv and CuArrays.

[pevnak]

There are couple issues I do not know, how to address.

1. Some functions have been restricted to upper triangular form due to the ambiguity caused by CuArray<:AbstractArray being true

2. I have removed streams from copy!, as I have not seen them really used. The connected problem is that I have commented

   statuscheck(ccall( (:cusparseSetStream, libcusparse), cusparseStatus_t, (cusparseHandle_t, cudaStream_t), handle, streamId))
end
function cusparseGetStream(handle, streamId)
  statuscheck(ccall( (:cusparseGetStream, libcusparse), cusparseStatus_t, (cusparseHandle_t, Ptr{cudaStream_t}), handle, streamId))
end

in libcusparse.jl. I have no idea, what streams are used for.

3. I had to add conversion to the pointer, as

Base.unsafe_convert(::Type{Ptr{T}}, a::CuArray{T}) where {T} = Base.unsafe_convert(Ptr{T}, a.ptr)

4. I had disable the following test

@test device(x)   == -1

since device is not the defined for CuArray.

[MikeInnes]

@pevnak I don't know if anyone is really maintaining this repo; if you want I can get you commit access so you can merge this at will?

[pevnak]

Hi Mike, I would probably not mind to get a commit access. I hope that I will have time to get back to programming for CUDA and make this work. In my area data are sparse.